. >> it's a stressful environment. we're trying to keep them as comfortable as we can. >> reporter: outside pittsburgh, when a water main broke in the middle of the night, single digit temperatures turned gushing water into a sheet of ice. subzero temps aren't all bad if you like ice boating. skimming across the ice at speeds up to 60 miles an hour in what looks like a mini kayak with a sail. for those who have to work outside -- >> as long as i bundle up really like double bundle, i'm good. i have a lot of clothes on. >> reporter: maybe the best way to get by is thinking hot. >> key largo is a great place this time of year. >> reporter: and the forecast high there today, 77 degrees. now, by contrast, in gaithersburg, maryland, yesterday dangerous for a cell phone worker who was up on a tower about 200 feet high when all of a sudden his hands went numb, his legs cramped up and a co-worker had to climb up to rescue him. he was treated at the hospital for hypothermia, but he'll be okay, so be careful out there. soledad.